MR perfusion and diffusion in acute ischemic stroke: Human gray and white matter have different thresholds for infarction

Michael S. Bristow, Jessica E. Simon, Robert A. Brown, Michael Eliasziw, Michael D. Hill, Shelagh B. Coutts, Richard Frayne, Andrew M. Demchuk, Joseph Ross Mitchell

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

It is thought that gray and white matter (GM and WM) have different perfusion and diffusion thresholds for cerebral infarction in humans. We sought to determine these thresholds with voxel-by-voxel, tissue-specific analysis of coregistered acute and follow-up magnetic resonance (MR) perfusion- and diffusion-weighted imaging. Quantitative cerebral blood flow (CBF), cerebral blood volume (CBV), mean transit time (MTT), and apparent diffusion coefficient (ADC) maps were analyzed from nine acute stroke patients (imaging acquired within 6 h of onset). The average values of each measure were calculated for GM and WM in normally perfused tissue, the region of recovered tissue and in the final infarct. Perfusion and diffusion thresholds for infarction were determined on a patient-by-patient basis in GM and WM separately by selecting thresholds with equal sensitivities and specificities. Gray matter has higher thresholds for infarction than WM (P<0.009) for CBF (20.0 mL/100 g min in GM and 12.3 mL/100 g min in WM), CBV (2.4 mL/100 g in GM and 1.7 mL/100 g in WM), and ADC (786 × 10-6 mm2/s in GM and 708 × 10 -6 mm2/s in WM). The MTT threshold for infarction in GM is lower (P=0.014) than for WM (6.8 secs in GM and 7.1 secs in WM). A single common threshold applied to both tissues overestimates tissue at risk in WM and underestimates tissue at risk in GM. This study suggests that tissue-specific analysis of perfusion and diffusion imaging is required to accurately predict tissue at risk of infarction in acute ischemic stroke.

Original languageEnglish (US)
Pages (from-to)1280-1287
Number of pages8
JournalJournal of Cerebral Blood Flow and Metabolism
Volume25
Issue number10
DOIs
StatePublished - Oct 2005
Externally publishedYes

Fingerprint

Infarction
Magnetic Resonance Spectroscopy
Perfusion
Stroke
Cerebrovascular Circulation
Perfusion Imaging
Gray Matter
White Matter
Cerebral Infarction
Sensitivity and Specificity

Keywords

  • Cerebral blood flow
  • Ischemic stroke
  • Magnetic resonance imaging
  • Magnetic resonance imaging, diffusion-weighted imaging
  • Magnetic resonance imaging, perfusion-weighted imaging

ASJC Scopus subject areas

  • Endocrinology
  • Neuroscience(all)
  • Endocrinology, Diabetes and Metabolism

Cite this

MR perfusion and diffusion in acute ischemic stroke : Human gray and white matter have different thresholds for infarction. / Bristow, Michael S.; Simon, Jessica E.; Brown, Robert A.; Eliasziw, Michael; Hill, Michael D.; Coutts, Shelagh B.; Frayne, Richard; Demchuk, Andrew M.; Mitchell, Joseph Ross.

In: Journal of Cerebral Blood Flow and Metabolism, Vol. 25, No. 10, 10.2005, p. 1280-1287.

Research output: Contribution to journalArticle

Bristow, MS, Simon, JE, Brown, RA, Eliasziw, M, Hill, MD, Coutts, SB, Frayne, R, Demchuk, AM & Mitchell, JR 2005, 'MR perfusion and diffusion in acute ischemic stroke: Human gray and white matter have different thresholds for infarction', Journal of Cerebral Blood Flow and Metabolism, vol. 25, no. 10, pp. 1280-1287. https://doi.org/10.1038/sj.jcbfm.9600135
Bristow, Michael S. ; Simon, Jessica E. ; Brown, Robert A. ; Eliasziw, Michael ; Hill, Michael D. ; Coutts, Shelagh B. ; Frayne, Richard ; Demchuk, Andrew M. ; Mitchell, Joseph Ross. / MR perfusion and diffusion in acute ischemic stroke : Human gray and white matter have different thresholds for infarction. In: Journal of Cerebral Blood Flow and Metabolism. 2005 ; Vol. 25, No. 10. pp. 1280-1287.
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AU - Hill, Michael D.

AU - Coutts, Shelagh B.

AU - Frayne, Richard

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